Experimental and numerical investigation of excitation of artificial disturbances in the supersonic boundary layer

Aleksey Yatskikh,Gleb Kolosov,Yury Yermolaev,Aleksander Kosinov,Aleksander Semenov,D.M Markovich,P.A Kuibin,M.A Vorobyev

doi:10.1051/epjconf/201919600017

Aleksey Yatskikh, Gleb Kolosov + Show 6 more

Open Access

https://doi.org/10.1051/epjconf/201919600017

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Abstract

The influence of the parameters of the impulse action on the laminar supersonic flat-plate boundary layer on the excited localized perturbations is investigated at Mach 2. The influence of the duration of a pulsed discharge on the generated disturbances is studied experimentally. Also, a direct numerical simulation of the influence of the parameters of pulse injection on generated perturbations is carried out. It is obtained that as the duration of the action on the supersonic boundary layer increases, the amplitude of the generated disturbance increases. The velocity of the propagation downstream of localized disturbances in Mach 2 supersonic flat-plate boundary layer is estimated.

Highlights

One of the most informative methods of experimental investigation of the laminarturbulent transition in boundary layers is the study of the evolution of artificial perturbations localized in time and space
Artificial localized disturbances can be excited in the boundary layer by means of impulse action
In the case of supersonic flows, localized disturbances can be excited by a pulsed electric discharge [1, 2]

Summary

Introduction

One of the most informative methods of experimental investigation of the laminarturbulent transition in boundary layers is the study of the evolution of artificial perturbations localized in time and space. Artificial localized disturbances can be excited in the boundary layer by means of impulse action. In the case of supersonic flows, localized disturbances can be excited by a pulsed electric discharge [1, 2] It was shown in [2] that the energy and duration of the pulsed discharge affect on the localized perturbations generated in the supersonic boundary layer. To develop methods for investigating the laminar-turbulent transition in supersonic boundary layers with the help of controlled perturbations, detailed data on the influence of the parameters of the action on the generated perturbations are needed

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